As I mentioned to another poster, I think the way we are being thrown down two paths in this conversation is the term ‘law’. We are not talking about writing in the books a legal requirement to follow Sharia, the term ‘law’ in this case is like how many Christians follow the Noahadic laws, not as a legal definition regulation, but as personal guidelines.
I understand where you are coming from, you don’t want the US legal system to adopt the requirement that Sharia law (’law’ as in criminal or judicial standards) be required. Most people here are talking about the personal practice of the parts of Sharia law (’law’ as in a personal morality) that are part of normal, individual freedoms.
We all are basically talking about two entirely different aspects of this.